Hi Axel, DL3ZH,

In my opinion, either one would be fine. I have the 400 Hz 8-pole in my K3, but, don't forget it is a roofing filter. In my RTTY setup, using the AFSK A digital mode, and I turn on the dual bandpass. The actual bandpass is then set by the DSP to two 50 Hz filters. It works great!

73,  John, W2GW


----- Original Message ----- From: "Axel Kaiser" <[EMAIL PROTECTED]>
To: "Elecraft Reflector" <[email protected]>
Sent: Thursday, May 15, 2008 3:52 PM
Subject: [Elecraft] RTTY Filter for K3



Hi K3-folks,

What would be the best RTTY roofing filter for the K3? Is the 400Hz 8-pole filter too small and the 500Hz 5-pole filter the better choice?

Thanks in advance for your answers.

73 de

Axel, DL3ZH

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